Paintbrush



FIG. 1 is a perspective view of a paintbrush showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The side opposite to that shown in FIG. 2 is a mirror image thereof. 

The ornamental design for a paintbrush, as shown and described. 